Bone-sawing machine



Oct. 28, 1930. N. B. HAFLEIGH 1,780,128 BONE sAwING MACHINE Filed Aug.31, 1928 5 Sheets-Sheet l Oct. 28, 1930. N, B, HAFLElGH I 1,780,128

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Patented Oct; Y28, 12930 T FFIQE NORMAN B. HAFLEIGH, OF PHLADELPHIA,PENNSYLVANIA- BONE-SAWING MACHINE Application filed August S1, 1928.Serial No..303,321.

Une object of my invention is to provide a machine Yfor sawing bonesused in the manufacture of buttons and like articles, which willprogressively cut the bone as it is fed through 5 the machine.

A still further object of the invention is to provide a machine with aseries of saws and an endless chain or belt having bone carriers, sothat as the bones are fed through the machine the saws will cut thebones into strips or slabs.

The invention relates also to details of construction of the carriers.

In the accompanying drawings:

Fig. 1 is a side View of my improved bone cutting machine;

Fig. 2 is an end view showing one method of driving the saws;

Fig. 3 is a sectional View on the line 3 3 of Fig. 1 showing themethodof centering the bonesin the carriers; .n

Fig. 4 is a side view of the-same;

Fig. '5 is a sectional View on the line r5--5 of Fig. 1 showing kthemeans of keeping the partly cut bone in line while making horizontalcutsg Fig. 6 is a side View of the device shown in Fe- 5;

Fig. 7 is a plan view of one of the carriers;

Fig. 8 is asectional `view on the line 8-8 ot' Fig. 7 of one of thecarriers; f

Fig. 9 is a side view of one of the carriers;

Fig. 10 is an end view of one of the carriers;

Fig. 11 is a perspective view, showing one type of bone usedin themanufacture of buttons;

keris in dotted lines;

Fig. 13 is a diagrammatic View showing the cut; and v lI*`ig.;14 is anend view of a modification of the invent-ion showing the `use of bandsaws in'place of circular saws.

1 is the frame of the'machine on which are guides 2 for the carriersSshown in detailin Figs.. 7 top10 inclusive. The base k4 of each carrierextends into slots 5 in the guides 2 and enters the slots at the pointFig. 1, and leaves the slots at pointy in said figure. The

Fig. 12 is a diagrammaticl view oit the saw different slabs oi' a boneseparated after being carriers are secured to an endless chain 6, in thepresent instance, which passes around sprocket wheels 7 and 8. rThesprocket wheel 8 is the driven wheel, and may be driven in any suitablemanner.

After a carrier enters the guides 2, a bone is placed on the carrieragainst the fixed jaw 9. The bone is then passed between two guide Yarms 10 which center the bone on the carrier.

The centering arms are geared together by segments 11, Fig. 3, whichintermesh and are pivotally mounted on supports 63 carried by the guides2-,and they are yieldingly held against the rbone by a spring 12. A slot13 eX- tends throughout the length ofeach carrier and -is closed by acap plate 14, and in the slot e is a slide'l. A spring v16 is attachedto a fixed plate lafat' one end ot the slot and is also attached to theslide and tends to retract the slide.

Carried by the slide is a movable jaw 17 having a tooth-gripping head 18which is nornia-lly projected through a slot 19 in the plate 14 by theaction of the spring 35 so as to grip. the bone as illustrated'in F ig.9.

Also carried by the slide 15 is a locking dog 2O which is pivot-ed at 21and-which engages a notch 22 in the j aw 1'? when in its normallyelevated position, as shown in Fig. 9, hold* ing the movable jaw kin itsraised position. The springl 16 of the slide holds the bones rigidlyagainst the fixed jaw 9.

l/Vithin the slide 15 a slot 22 in which is located a roller 23. Thisroller is mounted onan arm 24 on a shaft having at its outer end an arm26 on which is `coller 2T, which is in the path of the cams 28 and28preferL bly located on the saine side of the machine, f the cam 28 beingyon the front part oi' the inachine and located so that the roller 27begins to ridev upon it at the instant that the carrier reaches thepoint indicated at .r in Fig. 1. Thecam'28 is on the rear ci theina.,.iine and is so located that the roller 2'? begins to ride upon itj ust at the instant that thecarrier has passed the side saws and justbetere the norizontal saws begin to cut. The purpose or" the cam 28 isto lift the roller 27 just as the carrier reaches tie point@ in 1,thereby raising the arm 2G and causing the arm 24 and rcller 23 to movethe slide 15 (Figs. 7 and S). The movement of the slide 15 causes thegripping head 18 ot the jaws 17 to be moved av further distance from theiixed jaw 9 so that a bonev may be inserted in the space between the twojaws. As soon as the carrier carries the roller 27 beyond the cam 28,the spring 1G retracts the slide 15, carrying the head 18 against thebone. The bone is then held firmly on the carrier until it passes theseries ot' side saws and reaches the horizontal saws.

The movable jaw 17 is mounted on a spindle 29 on which is an arm 30having a roller 31 which is in the path of a cani 32, in this instance,located at the back o't' the last side saw on the side ot the machineopposite to that on which the cam 28 is located and extends to the endof the machine. The cams 28 and 32 are of substantially the same lengthso that their timesfof action are equal and both begin to function atthe same instant. On the spindle 21 of the locking dog 20 is an arm 33having a. roller 34 which is also in the path of the cam 32. The spring35 tends to raise the movable j aw while the spring 36 tends toyieldably hold the locking dog in engagement with the jaw 17 The cam 32tends to move the rollers 34 and 31 so that the` locking dog 20disengages the gripping head 18 and the gripping head is caused to movebelow the cap plate 14 as indicated in Fig. 8, while the carriers passthe horizontal saws. Aftery the side saws have made their cuts, then thebone shown at (L is held cen- Y trally by guides 37, as indicated inFigs. 5

and 6. These guides are mounted on brackets 88, 38, so that when thebone blanks pass into the guides, the rollers 34 and 31 of the lockingdog 20 and the movable jaw 17, respectively, ride upon the cam 32, theroller 34 striking the cam ahead ot the roller 31 to move the dog 20from the movable jaw 17. The jaw 17 will then be retracted by the cam 32as the roller 31 rides upon it. Simultaneously, the cam 28, on theopposite side of the machine, actuates roller 27, causing the arms 26and 24 to actnate the roller 23, which again moves the slide 15. causingthe gripping head 18 to release the bone. The bone is then pushed by theXed aw 9 and guided laterally bythe guide 37 while passing theliorizonta-l saws.

After the side saws cut the slabs b from the blank it is left intriangular' shape and sufficient bone is left at the bottom to allow oneor two slabs e to be cut therefrom. Asthe triangular blank enters thespace between the two guides 37, 37, the beveled edges of the blankextend into beveled slots in the guides as shown in Fig. 5, and as theblank is carried past the first horizontal saw a kerf (l is cut and thetriangular hollow piece is then discharged as waste. It it is desired tomake another slab then the thick slab which is still on the carrier issevered on the line d and the last slab is finally released at thedischarge end of the machine.

The slabs are discharged from the machine as soon as cut and arecollected in suitable boxes or other receptacles.

As shown in Figs. 1 and 2, the saws 40 and 41 are mounted on mandrels 42and 43 rcspectively. The mandrels are mounted on bearings 44. Thebearings 44 are supported by brackets 45 on each side of the machine andthe mandrel is set at such an angle that the different slabs b, b of thebone, Fig. 3, will be cuton the lines c, 0, Fig. 12. It will beunderstood that the angular position of ythese saws will be variedaccording to the type of bone being cut.

On each spindle 42 is a. pulley 46 in they present instance driven by abelt 47 which passes around pulleys 48 on shafts 49 mounted on suitablehangers. These shafts. are driven from the centraldrive shaft in thepresent instance. The horizontal saws51 are mounted on verticalmandi-els 52 which are adapted to bearings on the brackets 53. A beltpasses around a pulley on each mandrel, around guide pulleys 55 andaround the pulley 56 on one ofthe driven shafts 49, as clearly shown inFig. 2. The saws of each ot the grou )s 40, 41 and 51 are staggered inthe groups, that is to say each saw of each group is staggered withrelation to the remainder thereof to an extent producing a slab of thedesired thicl'- ness.

The two horizontal saws shown Lmake the two cuts d, d at the bottom ofthe bone blank, and produce the slabs e, e, Fig. 13.

In Figs. 1 and 2, I have illustrated cir# cular saws for making thecuts, but in Fig. 4 I'haver shown band saws 57, 58 and 59 which passaround guide pulleys 6() driven by belts 61 which in turn pass frompulleys on the driven shaft 62. While in Figs. 1 and 2, the

`machine is equipped with band saws, it may in some instances beequipped with both circular saws and band saws, if found desirable.

. The operation of the machine is as follows: Referring to Figs. 1 and2, the bones, such as shown in Fig. A11, are cnt to the proper lengthand are placed vin the machine by hand in the present instance, eachbone resting on an independent carrier. The bone is centered asdescribed above and clamped onto the carrier by the fixed and movablejaws. The bone is fed past the first set of saws which trim the ends ofthe bone, the ends being of a greater width usually than the center, thesecond set of saws make a second cut and produce one of the slabsfb.Tghe third set of saws make the third eut and produce another slab b,Fig. 13.

After the carrier with the bone leaves the angular jaws then the movablejaw is released fromthe boneby the action of cam 28 on the roller 27 andsimultaneously is retracted below the surface of the cap plate 14 by theaction of cam 32 on the rollers 34 Aand 3l respectively and the blank ispushed through guides to thehorizontal saws which cut the slabs c toform the triangular piece from the blank and this triangular piece isdischarged as waste, the lower slab e being held in the carrier untilitis Ydischarged at `the end of the machine;

While I have shown only one modication, for purposes ofiillustration anddescription, it will be apparent to those skilled in the art that otherchanges and modifications may be made without departing from the scopeof the invention and I, theretorader sire to be limited only by thescopeiof the from the sides and the bottom of the bone.

2; The combination in a machine'forsawing bones; of a series of carriersfor the bones; means for feeding the carriers through the machine;guides for the carriers, each carrier having a fixed and movable jaw;means at the feed end of the machine vfor moving each .movable jaw apredetermined distance from each fixed jaw as the carriers enter thefeed end of the machine so that a bone may be placed between each pairof said jaws; a centering device for centering the bones on thecarriers; means for clamping the movable jaw against the bones afterthey have been centered; means for sawing the bones angularly and"horizontally as they are held by the carriers; and means for releasingand retracting the movable at the instant the horizontal cut is to bemade so that it clears the horizontal sawing means.

3. The combination in; a bone sawing may chine, of. a series ofcarriers;means for feeding the carriers throughthe machine; guides for thecarrier; a fixed and movable'j aw on each carrier; a lookingdog for themovable jaw; an army on the movable jaw andy an arm on the locking dog;a camin the path of said arms for releasing the dog'and withdrawing themovable jaw; and a series of saws arranged to cut strips from thebody ofthe bone.

4. The combination ing bones, of a series. of carriers on which theybones are mounted; saws for cutting slabs from the bones, each carrierhaving a Vfixed anda movablejaw; a slide mounted in in a machine forsaw-` each carrier; a spring for retracting the slide, said movabley jawbeing pivoted on the slide; an arm engaging the slide; a cam engagingthe arm to move the slideV against the tension vof the spring ytoincrease the space between the fixed land movable jaw so as to allow abone to be inserted between thejaws; and means for raising the movablejaw so as to engage the bone. u

, 5. The combination; in a bone Vsawing machine, of a frame; a series ofside saws; a horizontal saw; an endless chain; a series of carriers onthe chain; Afixedand movable jaws on the carriers; the jaws holding thebones whilethe side saws are cutting; means for releasing and retractingthe movable jaws f below the level'of the upper surface of the carriersjust before the horizontal saw begins to cut; and side guides, the fixedjaw pushing the bone blank through the guides while the horizontal sawis cutting, said fixed jaw being sufficiently below the horizontal sawtoclear it.

6. In a machine for slab-cutting articles having an unusable centralportion extending longitudinally from end to end thereof, a series ofsaws disposed in angularly related groups, the saws of each group beingodset with relation to other saws of the same group to produce slabs ofdesired thickness and means for longitudinally moving the articlesthrough said series of saws.

7. In a machine for slab-cutting articles having a plurality oflongitudinally-extendin g angularly related usable portions groupedabout a longitudinally-extended unusable portion7 a carrier includingparts grasping opposite ends of one usable portion for moving thearticle along a fixed path and a group of saws foreach remaining usableportion disposed along said fixed path and positioned4 to intersect andcut the article as it moves therealong, the saws of each group beingoffset with relation to the remaining saws of the group. i

8. In. a machine for slab-cutting articles having a plurality oflongitudinally-extending angularly related usable portions grouped abouta longituchnally-extending unusable parts grasping portion, a carrierincluding opposite ends of one usable portion for moving the articlealong a fixed path, a group of saws kfor each remaining usable portiondisposed along said fixed pathand positioned to intersect and cut thearticle as it moves tlierealong, the saws of eacli'group being offsetwith relation tothe remaining' saws of the group; and a saw forsubsequently engaging the article as it moves along` said path andSeverin@ said unusable portion from the usable portion engaged by thecarrier.

9. The combination in a bone-sawing machine of a series of side saws anda horizontal saw, a series of carriers, means for feeding the carriersthrough the machine7 each carrier having movable and fixed jaws forclamping the bones, a slide on which the movable jaw is mounted, aspring attached to the slide for clamping the. movable jaw against thebone, a cam in advance of said saws operatively engaging the slide toshift the same and position the-movable jaw for Linsertion of a bone tothe carrier, a cam rearwardly of the side saws :nid in advance of thehorizontal saw for withdrawing the movable jaw below the upper surfaceof the carrier, and means for guiding the lower portion of the boneduring its passage by the horizontal saw, the fixed jaw of the carrierpushing the bone durinr its passage by said horizontal NORMAN B.HAFLEIGH.

Saw.

